Are you both using Ubuntu 12.10? Steam's hardware specifications are aimed for 12.04 not 12.10 simply because 04 is supported for several years whilst 10 is only supported for two. That's probably why Steam developers went with that. The libraries and such should be available even if you are on 12.10 anyway. So make sure you've upgraded.

Game update: AppID 520 "Team Fortress 2 Beta", ProcID 12433, IP 0.0.0.0:0ERROR: ld.so: object 'gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.ERROR: ld.so: object 'gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.ERROR: ld.so: object 'gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.ERROR: ld.so: object 'gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.ERROR: ld.so: object 'gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.ERROR: ld.so: object 'gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded: ignored.SDL video target is 'x11'SDL video target is 'x11'This system supports the OpenGL extension GL_EXT_framebuffer_object.This system supports the OpenGL extension GL_EXT_framebuffer_blit.This system supports the OpenGL extension GL_EXT_framebuffer_multisample.This system DOES NOT support the OpenGL extension GL_APPLE_fence.This system DOES NOT support the OpenGL extension GL_NV_fence.This system supports the OpenGL extension GL_ARB_sync.This system supports the OpenGL extension GL_EXT_draw_buffers2.This system DOES NOT support the OpenGL extension GL_EXT_bindable_uniform.This system DOES NOT support the OpenGL extension GL_APPLE_flush_buffer_range.This system supports the OpenGL extension GL_ARB_map_buffer_range.This system supports the OpenGL extension GL_ARB_vertex_buffer_object.This system supports the OpenGL extension GL_ARB_occlusion_query.This system DOES NOT support the OpenGL extension GL_APPLE_texture_range.This system DOES NOT support the OpenGL extension GL_APPLE_client_storage.This system DOES NOT support the OpenGL extension GL_ARB_uniform_buffer.This system supports the OpenGL extension GL_ARB_vertex_array_bgra.This system supports the OpenGL extension GL_EXT_vertex_array_bgra.This system supports the OpenGL extension GL_ARB_framebuffer_object.This system DOES NOT support the OpenGL extension GL_GREMEDY_string_marker.This system DOES NOT support the OpenGL extension GL_ARB_debug_output.This system DOES NOT support the OpenGL extension GL_EXT_direct_state_access.This system DOES NOT support the OpenGL extension GL_NV_bindless_texture.Could not find required OpenGL entry point 'glQueryCounter'! Either your video card is unsupported, or your OpenGL driver needs to be updated.X Error of failed request: BadName (named color or font does not exist) Major opcode of failed request: 45 (X_OpenFont) Serial number of failed request: 7 Current serial number in output stream: 8saving roaming config store to 'sharedconfig.vdf'roaming config store 2 saved successfullyGame removed: AppID 520 "Team Fortress 2 Beta", ProcID 12433 saving roaming config store to 'sharedconfig.vdf'roaming config store 2 saved successfully

got the same issue but using Mint 14 - Cinnamon x64. using AMD card so going to try that. i understand Devs are only looking for Ubuntu but i did state on beta invite was a Mint user and still got a invite